Adding-machine.



W. J. KILPATRIGK.

ADDING mama's. APPLICATION FILED IOV.25, 1908.

Patented July 27, 1909.

2 SHEETS-SHEET 1.

- W. J. KILPATRIGK.

ADDING MACHINE. APPLIOATION FILED x0v.25,19oa.

928,981,. I Rateflted Jul 27, 1909;

2 SHEETS-BHEET 2 UNITED STATES P gnnr OFFIC' WILLIAM J. KILPATRICK, OF'DETROIT, MICHIGAN, AssIeNoa To sarcoma ADDING MACHINE COMPANY, or DETROIT, MICHIGAN, A CORPORATION or MICHIGAN.

ADDING-MACHINE.

Specification .0! Letters Patent.

retested July 25*, 190a.

Application filed November 25, 190 8. Serial No. $61,406.

To all whom it may concern:

Be it known that LWVILLIAM J. KIL- PATIUCK, a citizen of the United States, residing at Detroit, in the county of \Vayne and State of Michigan, have invented certain new and useful Improvements in Addingiiiachines, of which the following a specification.

The present invention relates more partic ularly to adding machines adapted to'be operated by power, as by an electric motor, and

machines adapted to be either so operatedof the motor startingdevice and manipulation of other controlling devices before the motor has taken etiect upon the working parts oi. the machine. It has been found in practice that an electric motor applied to an tl(l(llllQ l11 lClllI1B is apt to be a trifle tardy in starting to operate the v machine and this makes it possible for the key or starting device to be released and another controlling device operated, as for example a total-key at a time when the result of such manipulation would be likely to result disastrously! To overcome thistrouble it is proposedby the present invention to provide for temporarily detaining the starting, device in the position to whichit is moved when releasmg the motor, thereby preventing a recovery to normal quickly enough'to permit of any such misoperation as above mentioned.

Another object of the present invention is to provide an improved form of means for disabling the full stroke devices when the inachine is being operated by power, at the same time providing for automatically reenablmg such devices when a handle is applied for operating the machine manually.

Reference may be had to Burroughs Adding lviachine Companys British Patent No.

12,083" of 1907, which shows the same type of adding machine displosed in said Vincent U: S. patent and illustrates one form of means for disabling the fullstroke de'vices.

By the present invention it is proposed to accomphsh the res'ult'with a'less amounhof friction than inherent in the construction of said British patent, both in the matter of movement of parts resulting from introduc 3- tion and removal of the detachable handle and in connection with .the movement of ports in regular operations of the machine when the full stroke devices have been disabled by removal of the handle. An addig tional improvement over the prior construction lies'in-the provision of means for dis abling certain auxiliary or supplemental atoll stroke devices which haveheretofore been employed in these machines for preventing m a reverse movement of the parts after starting backio normal and before theimain full stroke devices can come into play.

With the above and incidental objects in view, the invention consists in ce rta'in novel features of construction and combinations of parts the essential elements whereof are recited in the appended claims and a preferred form ofembodiment of which is i ill'ustrated in the drawings and described in detail hereinafter. I

Of said drawings, Figure 1 represents in sectionalized right 'side elevation an adding machine of the type shown in said prior patcuts, with the improvements of the present so.

inventionappl'ied thereto; Fig. 2 is a detached sectionalized right-side elevation of motor starting devices; Figs. 3, 4 and 5 are s milar secti-onalized right'sid'e elevations of I full-stroke devices, showing the same under .90 diflerent conditions; Fig. 6 is a similar view illustrating-a still different condition; and Fig. 7 is a vertical section taken on the line 77 of Fig. 1. In view of the disclosures of said prior '95. patents, it will not be necessary to describe in detail all of the parts of the machine proper or more than briefly refer to the arts of. the motor attachment or-the-detac able handle construction. A vertically movable fl bar 36 which operates detent devices for releasing the motor, such as described iii said Vincent patent, is lifted by depression of a finger baror key 36 located to the right of the banks or rows-of a cunt-keys 291.. This is eliected'through the'aciien of legs 3 6oi said bar upon levers 369,-and 36 connech edby a springBGtand; tlie;; ever 36:,conhected by a spring 36 with said bar 36 and car-- rying a stud engaging a slot of said bat-V Said lever 36 also carries a stud 14 cooperating with the segmental upper end 14; of

an arm lei secured to a rock shaft 1-l'-,- a-

crank arm of-Which is connected by aflink 14 with the total key bell crank lever This same construction is illustrated andde-.

scribed in Burroughs Adding Machine Uom panys Patent 1\o. 18,628 of 1300 and, as

there explained, the'purpose' is. to prevent operation of'the total'key after the starting bar 36* hastbeen depressed or, "v ce versa, the operation of said starting bar before the total keyhas been fully depressed. Another safeguard also disclosedin said last-mentioned British patent comprisesan .arm '14" I onthe rock shaft 14 carrying'a roller 1 1 cbtiperatingfwitha flange 31 on the -fullstrokesector-31, to prevent depression of the total key when the machine is in operation and, vice versinto prevent operation of the machine with the total key partially depressed.

- In carrying out the object first above explained provision is made fortemporarily detaining the vertical bar 36 in elevated position so as to prevent a recovery of the starting devices before the motor takes etlect upon the machine and thus preventing a misoperation such as might result from a 'depression of the total key, after the motor is. 'released. Of course said total key cannot be depressed after the sector 31 has been set in motion,but the 'action of the motor is sometimes a trifle tardy in starting the parts, so that the totalkey might inadvertently be depressed, either resulting in an erroneous performance of the machine or in some damage thereto. To prevent any such thing happening'the vertical bar 36 is formed-with an t ear 6 carrying a laterally projecting stud c,

preferably a rollerstud, and there is suspended from a shaft or cross-rod200 a pair of'detents or jaws c and .e -adapted to embrace said stud upon the lifting of the bar 5' 36 and'temporarily detain the latter. Said detents or jaws are loosely mounted upon the .shaft and held closed by-a spiral spring a connecting-suitable ears-formed upon them.

T he lowerportionsof the jaws are formed with diver ent confronting edges and e and back 0? the same with pockets 0 for receiving the stud c. When the bar 36 is ele-.

vated the stud moves into the flaring mouth formed between the edgeste and e of the .55 jaws and by acting uponsaid edges spreads apart the laws, which spring together again when the stud has passed into the pockets '6. The lower edges of the latter then detain the stud and the bar 36 and connected parts, reventing recovery of the-same prior to the orcible' depression of'the bar 36 by the ac- I "inward,

tion of the sector stud 31" upon-a branch of sa1d-bar'36 1n the manner explained m said pr1or patents. The lower BS-edges of .the pockets 0 are sullicientl'y beveled or inclined to provide for the i'orcing apart of the jaws and escape of the, stud when this action of the stud 31" on the bar all} takes place, though the round form of the l stud might be fully relied upon to produce the cannning eh'cct in this connection. The jaw c" is preferably elongated at its lower end to insure against the b LtlLl c getting out of register with the flaring mouth formed by the eug'cs c" and c". The opening movement of the aws is preferably limited byforining on the upper ends of the jaws lugs e" adapted to meet.

It will be seen that the above described construction will ellec-tually prevent any misoperation of the machine which might otherwise take place by reason of a prema' ture recovery of the starting devices when the motor was tardy in taking ellcct upon the machine. Passing now to the full stroke devices, the sector 31 is as usual provided with a notched periphery 31" tenminatingj in abrupt. edges 31 forming sides of pockets in which the usual full stroke pawl 31 rights itself at the extremes of the movement of said sector, a spring 31 being as usual applied to said "pawl so as to constantly tend to straighten the same. Such full stroke devices are used when the machine is being operated by hand toprevent incomplete movement of the parts and consequent derangement and erroneous operation of the mechanism, but when the machine is poweroperated the full stroke devices can be dispensed with and in fact it is preferable to disable them so as to prevent any possibility of a lock-up due to the speedy operation of the machine when motor driven.

Carrying out the I present invention, a thrust bar 19 is arranged to slide up and down through a slot in the tubular shaft 2 to which the sector 31 is secured, said bar being acted upon by the conical end of a stud lcarried by the detachable handle 3, the latter being constructed as usual to come into driving engagement with the shaft 2 when its stud is thrust through the same. The thrust bar 19 is slotted to en lbrace a stud, '19 on the frame of the machine and its lower end is pivotally connected to a lever 20 to the rear of the Frame stud 20" on which said lever is pivoted. A spiral spring 20 connects the rear extremity of said lever with another frame stud so as to'constantly tend to elevate the rear arm of the lever end of the latter into the bore of the-shaft 30 as illustrated in Fig. 4. The forward arm of the lever 20 is formed with a curved cam finger 21 adaptedto coiiperate with a stud 21 projecting laterallyfrom the pawl 31 Vhen the handle is detached and the lever correspondingly positioned as inl igs. 4: and

and the thrust bar 1.), projecting the upper 5, with its cam finger depressed, the pawl 31 will be'completely, disabled by being held entirely away from the sector 31. This'results from the fact that the spring 20 presses said cam finger against the stud E21 and as soon as the pawl is tilted one way or the other by action of either end edge 31 of the sector 31 against it, saidcam finger further tilts it until the movement is stopped by abutment of said pawl against a fixed Stud 31*. Fig. 4.- illustrates the effect when the handle is detached with the sector rocked forward and down and Fig. 5 illustrates the effect 'when the handle is detached with 115 the sector in its normal position. In the foriner instance the full stroke pawl would be in the upper pocket of the sector and would be rocked forward as to its acting end by contact with the upper edge 31", and

then rocked further by the cam finger 31 until stop ed by the stud 31 In the-other instance the acting end of the pawl would be in the lower pocket of thesector and would-be rocked rearwardly by contact with gig-the lower end edge 31 and then rocked further by the cam finger. In either case it will be seen that the acting end of the pawl is moved so far as'to be taken entirely out of position for contact with the full stroke sector. Consequently in further operations of the machine no friction at all will occur in the full stroke mechanism. When the handle is inserted the bar 19 is thrust down and the lever 20 rocked, elevat- 36 ing the cam finger 21and releasing the pawl 31' so that it can coact with the sector 31 in the usual manner, as illustrated in Fig. 6. Of course it must be. understood. that the 5 ring 20 is su 'eri or to the spring 31, or

40 ese capable .0

through leverage.

I'n previousconstructions of adding machines such as shown in said prior patents it has been customary to supplement the full .45 stroke devices above described, so as to prevent a reverse movement just after the parts start to return to normal. A number ofoperations take place just at this point, as for example the-throwing of the counter. into mesh with'its operating racks, and it is quite important to prevent a quick reverse movement of the parts after once starting back .to normal. The sector 31 can of course move an appreciable distance before the pawl 31 comes into engagement with the first notch of the raised peripheral edge 31. To prevent a reverse movement during the time a supplemental pawl has heretofore been employed, pivoted on a frame stud and adapted to coilpcrate with the stud on the sector. Such a pawl is shown in the abovencntioned' palent to Vincent and the Britlsn Patent No. 19.08%, and the pawl is V shown with a stud similar to the stud 21 6Q Ioi opcratingupon this supplementalpawl.

overpowering the latter.

to displace the latter when the primary pawl is tilted by contact with the lower terminal edge 31 of the sector, thus permitting a stud on the sector to pass the auxiliary pawl when the sector rocks forward and down. Upon the reversal of the primary pawl at the end of such movement of the sector the'auxiliary pawl is released and as the'sector starts back to normal position its stud passes the acting end of the auxiliary pawl, which immcdi ately springs behind such stud, preventing a reverse movement of the sector at a time when the primary pawl cannot operate to prevent such movement. in the accompany ing drawings the numeral designates a laterally projecting stud on the full stroke sector similar to the stud heretofore em ployed, but the auxiliary pawl not pivoted upon a frame stud, as heretofore, but is carv ried by the lever 20. Such pawl is designated by the numeral 22 and its pivot by the numeral 22". A spiral spring 22" cannects :1 depending ear of the pawl in rear of its pivot with a depending our of the lever 20 so as to tend constantly to rock the forward part of the pawl upward, such movement being limited by the contact of a flange 22 of the pawl against the top edge of the lever as illustrated in Figs. 3 and 4;. The auxiliary pawl is branched or bifurcated at its forward end to provide a portion to coact with the stud 22 in the usual manner and a lower portion or linger 22 for coiiperating with the stud 21 on the pawl 31". The operation of this auxiliary pawl as a full stroke device is much the some as usual, the tilting of the pawl 31 by contact with the lower terminal edge 31 of the sector causing the stud 21 to rock the pawl s) that the sector stud will pass the same in the forward and downward rocking of the sector. Then as the pawl 31" reverses the auxiliary pawl is released to coact with said stud 2'22 in the inanncr illustrated in Fig. I), where the sector is represented as having started on its return movement and the pawl .22 is reprce scntcd as having sprung behind the stud .22, the pawl 31 having of course riglited itself.

Now the purpose of mounting the auxiliary pawlcn the lever 20, instead of on a frame stud, as usual, is to provide for dis abling said auxiliary pawl as well as the prin'lary pawl when the handle of the inach-ine is detached. In Fig. 3 the handle is in place, so that the fsn-wu rd arm of the lever 20 is elevated and the auxiliary puwl positioned to be cll'cctivc, and the sumo thing is true as to Fig. (3, though of course the :1 uxiliary pawl is there shown out of line with the stud 22becausc the sector is moving lorward and downward. it will be noted, however, that in Figs. 4 and where the handle is detached and the forward arm oi'ihe lever 20 correspondiugly depressed. the auxiliary pawl 22-is bodily lowered out oii line with the stud 22 s.) that it cannot contact thereoughly fulfil the objects primarily stated,

yet it is to be understood that the constructions here shown are susceptible of modificw tion within the scope of the invention.

What is claimed is:

1. In a power driven machine ofthc class described, the combination with a movable starting member, manipulative means for moving the same, and a power operated element of the machine acting initially to restore said starting member; of a detent for temporarily holding the-latter in the position to which it is moved by the manipulative means.

2. In a power driven machine'ot' the class described, the combination with a movable starting member, manipulative means for moving the same, and a power operated element of the machine acting initially to restore said starting member; of a detent for temporarilyholding the latter through friction in the position to which it is moved by the manipulative means.

V 3. In a power driven machine of the class described, the combination with amovable starting member, manipulative means for moving the same, and a power operated element of the machine acting initially to re sto'resaid starting member; of a detent for temporarily. holding the latter in the position to which it is moved by the manipulative means, said detent being yicldingly held in operative position.

In a power driven machine of the class described, the (ClIllJllltlilOll with a movable starting member, manipulative means for movi-ngthe same, and a power operated element of the machine acting initially to re sald starting member: of sprmg-clost-al store jaws tor temporarily holding the latter 'in the positioirto which it is moved by the manipulative means. i

In a power driven machine of the class described, the COlIllJllltltlOll with a movable starting member having ,a pro ecting stud, manipulative means for movlng said memher, and a power operated element of the machine acting initially to restore said start ing member; of sprng-closed jaws for en-' gaging the stud. of the latter to temporarily hold it in the position to which it is moved by the manipulative means, said jaws having divergent confronting edges forming a flaring month to receive the stud and divergent holding edges back of said month.

6. Ina machine of the class described, the combination with a power drive, a, detach able handle, a full-stroke sector, and a pawl cooperating with the latter, of means for disabling the pawl undercontrol of the handle', said means operating, with the handle detached, to prevent any engagement betweenthe pawl and the sector exceptthe initial cngagen'ient which swings the pawl to position for engaging the outermost edge of the sector.

T. In a machine of the class described, the combination. with a power drive, a detachable handle, a full-stroke sector, and a pawl cooperating with thelatter; of a pawl-displacing member controlled by the handle and operating, with the latter detached, to prevent any engagement between the pawl and the sector except the initial engagement which swings the pawl to position for en gaging the outermost edge of the sector,

8: In a machine of the class described, the combination with a power drive, a detachable handle, a full-stroke sector, and a pawl cooperating with. the latter; of a. springactuated pawl-displacing member controlled by the handle and operating, with the latter detached, to prevent any engagement between the pawl and the sector except the initial engagement which swings the pawl to position for engaging the outermost edge of the sector. 9, In a machine of the class described, the combination with a power drive, a detachable handle, a-t'ull-stroke sectonand a pawlcoiiperating with the latter; of a. pawl-displacing member. in the form of a cam-lever controlled by the. handle and operating, with the latter detached, to prevent any engage ment between the pawl and the sector except the initial engagenientwhich swings the pawl to position for engaging the outermostedge of the sector 10. In a machine of the class described,

the combination, with a power drive, a detachable handle, a full-stroke sector, and a pawl cooperating with the, latter; of a spring-actuated pawl displacing canrlever, and a thrust-bar coupled thereto and adapt ed to be operated by the handle. 11. The, combination with a power drive, a detachable handle, an oscillatory fullst-rokc sector. a. double acting pawl cooperating therewith, and an auxiliary pawl displaced by the first mentioned pawl when the latter is riding on the outermost 'edge of the sector and adapted on reversal of the first mentioned pawl to become effective to prevent reverse movement of the sector when once sta-rtedimnd until the first mentioned pawl becomes eil'ectzive to prevent such movement; of means for disabling both pawls under control of the handle.

12. In a machine of the class described, the combination, with a. power drive, a detachable handle, a full-stroke sector having a notched periphery and deepened end edges beyond the same and a lateral stud, a pivotal spring-straightened pawl adapted to be tilted by contact with either such deepened end edge and to then traverse the notched periphery and right itself upon the passing of the latter, and an auxiliary pawl spring drawn to position for coaction. with the aforesaid stud and adapted to be displaced by the first mentioned pawl when tilted one way, the said stuthpassing by the end of the auxiliary-pawl as the sector nears the end of its movement in the direction for so tilting the first-mentioned pawl. and saidauxiliary pawl being then released by the righting of the first-mentioned pawl so that upon initial returifmovement of the sector the auxiliary pawl springs behind the stud; of meansunder control of the detachable handle for disabling both pawls.

13. In a machine of the class described, the combination. with a power drive, a detachable handle. a full-stroke sector, and a pawl 'cot'iperating with the latter; of means for disal'iling the pawl under control of the hancombination with a. power drive, a detachdle. said means operating, with the handle detached. to prevent any engagement: bet \'ct?ll the pawl. and the sector except the initial engagement which swings the pawl to poq tion for engaging the outermost" edge of the sector. an auxiliary paw displaced by the firstmentioncd pawl when the latter is riding on tile outermost edge of the sector and adapted onreversal of the first mentioued pawl to become eli'ective to prevent reverse movement of the sector when once started and until the first mentioned pawl becomes cii't tivc to prevent: such movmnent; said auxiliary pawl being; disabledas an i!!- 5 cidenl to the dieablement ot the first-mentioned pawl.

14. in a tiltlt'llillt' ol" the cla s d esr'ribe ii. the mbination with a power drive. a detachable handle. a full-stroke rt 'itil'. and a pawl cooperating with the latter: of a pawl-dis placing member controlled by the handle and .1

operating. with the latter (lGttKfllQtl. to prev nt any engagement between the pawl and I the sector except the initial engagement which swings the pawl to position for engaging the outermost edge of the sector. and an auxiliary pawl. displaced by the firstmei'ztioned pawl when the latter is riding on the outermost edg e of the sector and adapted on reversal of the first-mentioned pawl to become effective to prevent reverse move ment of the sector when 'once started and until the first-mentioned pawl'beeomes effective to prevent such movenient; said auxiliary pawl being carried by the aforesaid pawl-displacing member and adapted to be moved to an inoperative position by the same when it is rendered inefi'ective by detachment ot' the operating handle.

15. In a machine of the class described, the combination with -a power drive, a detachable handle, a fullstroke sector, and a pawl cooperating with the latter; of a springactuated pawl-displacing cam-lever, a thrustbar coupled thereto and adapted to be operated by the handle; and an auxiliary pawl mounted upon said cam-lever and adaptedto be displaced by the firstnnentioned pawl when the latter is riding on the outermost edge of the sector-and adapted on reversal of the first-mentioned pawl to become effective to prevent reverse movement of-the sector when once started and until the first;

mentioned pawl becomes eifective to prevent such movement; said aux liary pawl adapted to be moved to inoperative position when the cam-lever shifts upon detachment of the I operating han ile.

16. In a machine of the class described, the

able handle. a full-stroke sector having" auotched periphery and deepened end edges beyond the :atmc and a lateral stud, a piyotal spring-straightened pawl adapted to be tilted by contact with either such deepened end, edge and to then traverse the notched periphery and right itself upon the passing of the latter, of a lever spring-drawn to position for disabling said pawl; 21. thrust-bar connected to said lcverand adapted to be operated by. the handle in the application thereof to the machine: and an auxiliary pawl pivotally mounted upon said lever and spring-drawn to position for eoaction with .the aforesaid stud and adapted to be dis-o placed the first-mentioned pawl when tilted one way. the said stud passing by the endof the auxiliary pawl as the sector nears the end of its movement in the direction for s tilting the first-mentioned pawl, and said auxiliary pawl being then released by the righting of the first-mentioned pawl so that upon initial return movement of the sector the auxiliary pawl springs behind the. stud.

\VILLTAM J. KILPATRICK. \Vitnesses: 1

J. G. VINCENT,

R. S. MIELI-nrr. 

